integration/http/src/main/java/io/seata/integration/http/XidResource.java
/*
 *  Copyright 1999-2019 Seata.io Group.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package io.seata.integration.http;

import io.seata.common.util.StringUtils;
import io.seata.core.context.RootContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Xid handler.
 *
 * @author wangxb
 */
public class XidResource {

    private static final Logger LOGGER = LoggerFactory.getLogger(XidResource.class);


    public static void cleanXid(String rpcXid) {
        String xid = RootContext.getXID();
        if (xid != null) {
            String unbindXid = RootContext.unbind();
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("unbind[{}] from RootContext", unbindXid);
            }
            if (!StringUtils.equalsIgnoreCase(rpcXid, unbindXid)) {
                LOGGER.warn("xid in change during RPC from {} to {}", rpcXid, unbindXid);
                if (unbindXid != null) {
                    RootContext.bind(unbindXid);
                    LOGGER.warn("bind [{}] back to RootContext", unbindXid);
                }
            }
        }
    }
}
